ref(vcs): Make extract_pr_base_sha_from_event like extract_pr_head_sha_from_event

Author: chromy

src/utils/vcs.rs

@@ -575,7 +575,7 @@ pub fn find_base_sha() -> Result<Option<String>> {
         .and_then(|event_path| std::fs::read_to_string(event_path).map_err(Error::from))
         .context("Failed to read GitHub event path")?;
 
-    extract_pr_base_sha_from_event(&github_event)
+    Ok(extract_pr_base_sha_from_event(&github_event))
 }
 
 /// Extracts the PR head SHA from GitHub Actions event payload JSON.
@@ -595,15 +595,19 @@ fn extract_pr_head_sha_from_event(json_content: &str) -> Option<String> {
 }
 
 /// Extracts the PR base SHA from GitHub Actions event payload JSON.
-/// Returns Ok(None) if not a PR event or if SHA cannot be extracted.
-/// Returns an error if we cannot parse the JSON.
-fn extract_pr_base_sha_from_event(json_content: &str) -> Result<Option<String>> {
-    let v: Value = serde_json::from_str(json_content)
-        .context("Failed to parse GitHub event payload as JSON")?;
+/// Returns None if not a PR event or if SHA cannot be extracted.
+fn extract_pr_base_sha_from_event(json_content: &str) -> Option<String> {
+    let v: Value = match serde_json::from_str(json_content) {
+        Ok(v) => v,
+        Err(_) => {
+            debug!("Failed to parse GitHub event payload as JSON");
+            return None;
+        }
+    };
 
-    Ok(v.pointer("/pull_request/base/sha")
+    v.pointer("/pull_request/base/sha")
         .and_then(|s| s.as_str())
-        .map(|s| s.to_owned()))
+        .map(|s| s.to_owned())
 }
 
 /// Given commit specs, repos and remote_name this returns a list of head
@@ -1734,7 +1738,7 @@ mod tests {
 }"#;
 
         assert_eq!(
-            extract_pr_base_sha_from_event(incomplete_json).unwrap(),
+            extract_pr_base_sha_from_event(incomplete_json),
             None
         );
     }